Finding the Fourth Proportional to 2,131.36, 3,196.54 and 814.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.36 : 3,196.54 = 814.63 : x
2. Step 2: Convert to fraction form
   2,131.36/3,196.54 = 814.63/x
3. Step 3: Cross multiply
   2,131.36x = 3,196.54 × 814.63
4. Step 4: Simplify right side
   2,131.36x = 2,604,003.10
5. Step 5: Solve for x
   x = 2,604,003.10/2,131.36
6. Step 6: Final answer
   x = 1,221.75